3D display device and manufacturing method thereof

1. A method for manufacturing a 3D display device, comprising steps of: A1, preparing a display unit, a polarization direction of the emitting light of the display unit being adjusted to be parallel to a ridge direction of a concave lens film of a birefringent grating to be formed later; A2, disposing a transparent substrate on a light emitting side surface of the display unit; A3, forming a transparent electrode on the transparent substrate disposed on the light emitting side surface of the display unit; B1, forming the concave lens film on the transparent electrode; C1, rubbing the concave lens film along the ridge direction of the concave lens film; D1, forming liquid crystal polymer on a light emitting side surface of the concave lens film to make the liquid crystal polymer being oriented by the concave lens film; E1, forming an alignment layer on another transparent substrate followed by orienting through rubbing, after which the another substrate formed with the alignment layer is directly assembled together with the concave lens film to form the birefringent grating, with liquid crystal polymer interposed therebetween; and F1, orienting and curing the liquid crystal polymer in the birefringent grating.

2. The method according to claim 1 , wherein the A1 further comprises disposing a half-wave plate at a light emitting side of a display of the display unit, the half-wave plate positioned between the display and the birefringent grating, for adjusting a polarization direction of emitting light of the display to be parallel to the ridge direction of the concave lens film of the birefringent grating.

3. The method according to claim 2 , wherein the display is a liquid crystal display, a plasma display or an electroluminescent display.

4. The method according to claim 2 , wherein an angle between the ridge direction of the concave lens film and a horizontal plane is θ, and an angle between the polarization direction of the emitting light of the display and the horizontal plane is α, and an angle between an optical axis direction of the half-wave plate and the horizontal plane is (α+θ)/2.

5. The method according to claim 4 , wherein the half-wave plate comprises two substrates each having a transparent electrode and an alignment layer, and liquid crystal polymer interposed between the two substrates, and the optical axis direction of the half-wave plate is adjusted to have an angle of (α+θ)/2 with respect to the horizontal plane by controlling deflection of liquid crystal molecules in the liquid crystal polymer.

6. The method according to claim 4 , wherein the half-wave plate comprises upper and lower substrates and alignment layers formed on the surfaces thereof, and liquid crystal polymer interposed between the upper and lower substrates, and wherein a rubbing direction on a surface adjacent to the display unit thereof has an angle of α with respect to the horizontal plane, and a rubbing direction on another surface thereof has an angle of θ with respect to the horizontal plane.

7. The method according to claim 1 , after step A1 and before step B1, further comprises coating an alignment layer on the concave lens film.

8. The method according to claim 1 , wherein the liquid crystal polymer is a polymerizable material having a birefringent property.